using System;
using System.Collections.Generic;
using System.Linq;
using AibisDream.Framework;
using AibisDream.EditorTools;
using AibisDream.UI;
using NUnit.Framework;
using TMPro;
using UnityEditor;
using UnityEditor.AddressableAssets;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.SceneManagement;

namespace AibisDream.SystemEditor.Tests
{
    public sealed class TypographyContractTests
    {
        private const string ProfileFolder = "Assets/GameContent/Common/Typography/Profiles";

        [TestCase(LocaleKind.Cn, TypographyProfileKind.ZhHans)]
        [TestCase(LocaleKind.Ja, TypographyProfileKind.Japanese)]
        [TestCase(LocaleKind.En, TypographyProfileKind.Latin)]
        [TestCase(LocaleKind.Es, TypographyProfileKind.Latin)]
        [TestCase(LocaleKind.PtBr, TypographyProfileKind.Latin)]
        [TestCase(LocaleKind.Ru, TypographyProfileKind.Russian)]
        public void LocaleMapping_UsesExpectedProfile(LocaleKind locale, TypographyProfileKind expected)
        {
            Assert.That(TypographyLocaleMapping.GetProfileKind(locale), Is.EqualTo(expected));
            Assert.That(
                TypographyLocaleMapping.GetProfileKey(locale),
                Is.EqualTo($"Typography/Profile/{expected}"));
        }

        [Test]
        public void Resolve_MissingRoleFallsBackToBody()
        {
            TMP_FontAsset font = AssetDatabase.LoadAssetAtPath<TMP_FontAsset>(
                "Assets/Font/Assets/ChillBitmap_16px SDF.asset");
            var profile = ScriptableObject.CreateInstance<TypographyProfile>();
            try
            {
                var body = new TypographyStyle(TypographyRole.Body, font);
                profile.Configure(TypographyProfileKind.Latin, new[] { body });
                Assert.That(profile.Resolve(TypographyRole.Dialogue), Is.SameAs(body));
            }
            finally
            {
                UnityEngine.Object.DestroyImmediate(profile);
            }
        }

        [Test]
        public void Binding_ReapplyUsesCapturedBaselineWithoutAccumulatingMetrics()
        {
            TMP_FontAsset font = AssetDatabase.LoadAssetAtPath<TMP_FontAsset>(
                "Assets/Font/Assets/ChillBitmap_16px SDF.asset");
            var profile = ScriptableObject.CreateInstance<TypographyProfile>();
            var go = new GameObject("TypographyMetricContract", typeof(RectTransform));
            try
            {
                TextMeshProUGUI text = go.AddComponent<TextMeshProUGUI>();
                text.fontSize = 40f;
                text.lineSpacing = 3f;
                text.characterSpacing = 2f;
                LocalizedTypography binding = go.AddComponent<LocalizedTypography>();
                profile.Configure(
                    TypographyProfileKind.Latin,
                    new[]
                    {
                        new TypographyStyle(
                            TypographyRole.Body,
                            font,
                            fontSizeMultiplier: 0.75f,
                            lineSpacingOffset: 1f,
                            characterSpacingOffset: 2f)
                    });

                binding.ApplyProfile(profile);
                binding.ApplyProfile(profile);

                Assert.That(text.fontSize, Is.EqualTo(30f));
                Assert.That(text.lineSpacing, Is.EqualTo(4f));
                Assert.That(text.characterSpacing, Is.EqualTo(4f));
            }
            finally
            {
                UnityEngine.Object.DestroyImmediate(go);
                UnityEngine.Object.DestroyImmediate(profile);
            }
        }

        [Test]
        public void FirstRoundProfiles_AreCompleteAndAddressableByConvention()
        {
            foreach (TypographyProfileKind kind in Enum.GetValues(typeof(TypographyProfileKind)))
            {
                TypographyProfile profile = AssetDatabase.LoadAssetAtPath<TypographyProfile>(
                    $"{ProfileFolder}/{kind}.asset");
                Assert.That(profile, Is.Not.Null, kind.ToString());
                Assert.That(profile.ProfileKind, Is.EqualTo(kind));
                Assert.That(profile.GetValidationErrors(), Is.Empty, kind.ToString());
                Assert.That(
                    Enum.GetValues(typeof(TypographyRole)).Cast<TypographyRole>()
                        .All(role => profile.Resolve(role) != null),
                    Is.True,
                    kind.ToString());

                string guid = AssetDatabase.AssetPathToGUID($"{ProfileFolder}/{kind}.asset");
                var entry = AddressableAssetSettingsDefaultObject.Settings.FindAssetEntry(guid);
                Assert.That(entry, Is.Not.Null, kind.ToString());
                Assert.That(entry.address, Is.EqualTo($"Typography/Profile/{kind}"));
            }
        }

        [Test]
        public void TerminalPrefabs_BindEveryTextExactlyOnce()
        {
            foreach (string path in TerminalTypographyMigration.PrefabPaths)
            {
                GameObject prefab = AssetDatabase.LoadAssetAtPath<GameObject>(path);
                Assert.That(prefab, Is.Not.Null, path);

                TMP_Text[] texts = prefab.GetComponentsInChildren<TMP_Text>(true);
                Assert.That(texts, Is.Not.Empty, path);
                foreach (TMP_Text text in texts)
                {
                    LocalizedTypography[] bindings = text.GetComponents<LocalizedTypography>();
                    Assert.That(bindings, Has.Length.EqualTo(1), $"{path}: {text.name}");
                    Assert.That(bindings[0].Role, Is.EqualTo(TypographyRole.Terminal),
                        $"{path}: {text.name}");
                }
            }
        }

        [Test]
        public void PersistenceTerminalComposition_InheritsTypographyBindings()
        {
            Scene scene = SceneManager.GetSceneByPath(TerminalTypographyMigration.PersistenceScenePath);
            bool openedForTest = !scene.IsValid() || !scene.isLoaded;
            if (openedForTest)
            {
                scene = EditorSceneManager.OpenScene(
                    TerminalTypographyMigration.PersistenceScenePath,
                    OpenSceneMode.Additive);
            }
            try
            {
                Component[] hosts = scene.GetRootGameObjects()
                    .SelectMany(root => root.GetComponentsInChildren<Component>(true))
                    .Where(component => component is TerminalPanel || component is InGameTerminalPanel)
                    .ToArray();
                Assert.That(hosts, Has.Length.EqualTo(2));

                var violations = new List<string>();
                foreach (Component host in hosts)
                {
                    foreach (TMP_Text text in host.GetComponentsInChildren<TMP_Text>(true))
                    {
                        LocalizedTypography[] bindings = text.GetComponents<LocalizedTypography>();
                        if (bindings.Length != 1)
                        {
                            violations.Add($"{host.name}: {text.name} has {bindings.Length} bindings");
                            continue;
                        }

                        if (bindings[0].Role != TypographyRole.Terminal)
                            violations.Add($"{host.name}: {text.name} uses {bindings[0].Role}");
                    }
                }

                Assert.That(violations, Is.Empty, string.Join("\n", violations));
            }
            finally
            {
                if (openedForTest)
                    EditorSceneManager.CloseScene(scene, true);
            }
        }

    }
}